Description

2-[[4-[[4-[[7-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-2,5-dimethoxyphenyl]azo]-6-sulfo-1-naphthalenyl]azo]-1,4-benzenedisulfonic acid tetrasodium salt is a high-purity, polyfunctional azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonic acid groups, makes it a key precursor for synthesizing high-performance dyes and pigments. This compound is primarily sought by manufacturers in the specialty chemicals sector who require reliable and consistent raw materials for producing colorants with specific properties such as enhanced color fastness, solubility, and affinity for various substrates.

Application

• Primary Intermediate for Reactive Dyes: Synthesis of high-grade reactive dyes used in textile dyeing and printing, particularly for cotton and other cellulose fibers.
• Production of Acid Dyes: Manufacturing of acid dyes for coloring wool, silk, nylon, and leather, where its sulfonate groups provide excellent water solubility and substantivity.
• Specialty Pigment Manufacturing: Serving as a crucial building block in the production of high-performance organic pigments for inks, coatings, and plastics.
• Research & Development: Used in chemical R&D laboratories for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Functional Dye Synthesis: Potential use in creating functional dyes for non-textile applications, such as in optical data storage or as sensitizers.

Basic Information

Product Name	2-[[4-[[4-[[7-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-2,5-dimethoxyphenyl]azo]-6-sulfo-1-naphthalenyl]azo]-1,4-benzenedisulfonic acid tetrasodium salt
CAS No.	72245-47-7
Molecular Formula	C41H28N8Na4O19S4
Molecular Weight	1152.85 g/mol (approx.)
Synonyms	Tetrasodium 2-[[4-[[4-[[7-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthyl]azo]-2,5-dimethoxyphenyl]azo]-6-sulfo-1-naphthyl]azo]-1,4-benzenedisulfonate; C.I. Reactive Red 238 (related); Polyazo dye intermediate; Tetrasulfonated azo dye intermediate; Benzenesulfonic acid, 2-[[4-[[4-[[7-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-2,5-dimethoxyphenyl]azo]-6-sulfo-1-naphthalenyl]azo]-, tetrasodium salt; 72245-47-7; Complex sulfonated azo compound
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot undergoes comprehensive analytical testing, including HPLC for purity and assay, identification by spectroscopic methods (IR, UV-Vis), and control of key impurities. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting all relevant specifications. We are committed to meeting the stringent requirements of the global specialty chemical industry.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%
Solubility (in Water)	Freely soluble

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.